diff --git a/server-application-server/source/java/ch/ethz/sis/openbis/generic/server/xls/export/helper/XLSExperimentTypeExportHelper.java b/server-application-server/source/java/ch/ethz/sis/openbis/generic/server/xls/export/helper/XLSExperimentTypeExportHelper.java
index a11dc8df48c5a9616a477e0ca613717cb41fa1ea..cc9c8b894a2c0b1a4b02aafcf00fd4be9682b6d7 100644
--- a/server-application-server/source/java/ch/ethz/sis/openbis/generic/server/xls/export/helper/XLSExperimentTypeExportHelper.java
+++ b/server-application-server/source/java/ch/ethz/sis/openbis/generic/server/xls/export/helper/XLSExperimentTypeExportHelper.java
@@ -17,6 +17,7 @@ package ch.ethz.sis.openbis.generic.server.xls.export.helper;
 
 import static ch.ethz.sis.openbis.generic.server.xls.export.Attribute.CODE;
 import static ch.ethz.sis.openbis.generic.server.xls.export.Attribute.DESCRIPTION;
+import static ch.ethz.sis.openbis.generic.server.xls.export.Attribute.MODIFICATION_DATE;
 import static ch.ethz.sis.openbis.generic.server.xls.export.Attribute.VALIDATION_SCRIPT;
 import static ch.ethz.sis.openbis.generic.server.xls.export.Attribute.VERSION;
 
@@ -50,7 +51,7 @@ public class XLSExperimentTypeExportHelper extends AbstractXLSEntityTypeExportHe
     @Override
     protected Attribute[] getAttributes(final ExperimentType entityType)
     {
-        return new Attribute[] { VERSION, CODE, DESCRIPTION, VALIDATION_SCRIPT };
+        return new Attribute[] { VERSION, CODE, DESCRIPTION, VALIDATION_SCRIPT, MODIFICATION_DATE };
     }
 
     @Override
@@ -77,6 +78,10 @@ public class XLSExperimentTypeExportHelper extends AbstractXLSEntityTypeExportHe
             {
                 return String.valueOf(VersionUtils.getStoredVersion(allVersions, ImportTypes.EXPERIMENT_TYPE, null, experimentType.getCode()));
             }
+            case MODIFICATION_DATE:
+            {
+                return DATE_FORMAT.format(experimentType.getModificationDate());
+            }
             default:
             {
                 return null;
diff --git a/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/ExperimentTypeExpectations.java b/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/ExperimentTypeExpectations.java
index d64d23cda4148e95d53dad2849ff2abf30a55360..09f4a190b81460106bc58981e821337a7c4a83af 100644
--- a/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/ExperimentTypeExpectations.java
+++ b/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/ExperimentTypeExpectations.java
@@ -59,7 +59,7 @@ class ExperimentTypeExpectations extends Expectations
                 final PluginFetchOptions pluginFetchOptions = fetchOptions.withValidationPlugin();
 
                 final Calendar calendar = Calendar.getInstance();
-                calendar.set(2023, Calendar.MARCH, 10, 17, 23, 44);
+                calendar.set(2023, Calendar.MARCH, 11, 17, 23, 44);
                 final Date modificationDate = calendar.getTime();
 
                 final ExperimentType experimentType = new ExperimentType();
diff --git a/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/resources/export-experiment-type.xlsx b/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/resources/export-experiment-type.xlsx
index 1d480dc78706e7970e899823e361a4ec5e3396e8..b44f7fa22612e3fdee9b7cdf50992d24f2c19d84 100644
Binary files a/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/resources/export-experiment-type.xlsx and b/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/resources/export-experiment-type.xlsx differ
diff --git a/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/resources/export-sample-type.xlsx b/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/resources/export-sample-type.xlsx
index 2c1e3e5719ea2f1b90a1ebbb4d049c426894f4cf..d1c0491590faea8d876f23a0e97256d5a068fccb 100644
Binary files a/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/resources/export-sample-type.xlsx and b/server-application-server/sourceTest/java/ch/ethz/sis/openbis/generic/server/xls/export/resources/export-sample-type.xlsx differ